XRD and TG-DTG Probes for Thermal Stability and Durability of CuPbI3: Eu+2/Eu+3 and CuPbI3 Perovskite as Catalysts
Tóm tắt
The remarkable hole transport abilities of copper iodide and ionic transportation abilities of lead iodide help in enhancement of their electrical and catalytic properties. The combination of the two has resulted in a perovskite with excellent catalytic and electrical properties. To improve the aforementioned properties of CuPbI3 perovskite, it was doped with EuO and Eu2O3. CuPbI3 and CuPbI3: Eu+2/Eu+3 perovskites were synthesized using combustion method. Four CuPbI3: Eu+2/Eu+3 perovskites with varying compositions were prepared by doping 10, 20, 30 and 40% of Eu+2 and Eu+3 into CuPbI3 perovskite lattice in equal amounts. The structural and thermal characteristics were analyzed using TG-DTG and XRD analysis techniques. The results obtained from XRD analysis suggest that the degree of crystallization increases with an increase in doping of Eu+2/Eu+3. Also, an increase in other structural parameters such as unit cell volume and crystallite size with doping of Eu+2/Eu+3 indicate potential boost in catalytic properties of the aforementioned perovskites. The TG-DTG analysis results indicate that the CuPbI3 perovskite is more stable at lower temperatures (50–430 °C) while CuPbI3: Eu+2/Eu+3 (10–40%) are more thermally stable in the temperature range of 50–505 °C. Also, the overall weight loss was found to be significantly higher in case of CuPbI3 as compared CuPbI3: Eu+2/Eu+3 as indicated by the TG-DTG analysis results. These enhanced structural and catalytic properties of CuPbI3 perovskite escalate its applicability as photovoltaic cells and catalysts.
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